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Room temperature controller | Floor temperature monitoring
Object no.
964, 1006,
1048, 1090,
1132, 1174,
1216, 1258,
1300, 1342,
1384, 1426
2-byte object via which the controller outputs the period of the boost function. The
residual time of the boost function is transmitted via the object in 10 second incre-
ments.
10.8
Floor temperature monitoring
The cyclical monitoring of the floor temperature can be activated in the controller in
order to influence the minimum or maximum temperature of a floor heating system. If
the monitoring is enabled in the ETS, the controller continuously monitors the floor
temperature. If the floor temperature exceeds a specified limiting value during heat-
ing or falls below a specified limiting value during cooling, the controller switches off
the corresponding command value for heating or cooling. This switches off the heat-
ing or cooling and the system cools down or heats up. The controller will only set the
most recently calculated command value again when the temperature exceeds / falls
below the limiting value minus a hysteresis of 1 K.
With a pulse width-modulated command value, the temperature limit only
switches off the command value when the current PWM time cycle has
elapsed.
Depending on the configuration, the temperature may have a strong impact on
the controller behaviour. Poor parameterisation of the limit temperature (limit
temperature near to the room/setpoint temperature) means that it is possible
that the specified setpoint temperature for the room can never be reached!
The cyclical monitoring of the floor temperature is used to increase the comfort
behaviour of the heating/cooling system and must not be used as a safety-rel-
evant protection function (immediate forced switch-off of the heating/cooling
performance).
Which operating mode the cyclical monitoring should be applied to can be set in the
ETS. It is possible to limit the minimum and / or the maximum floor temperature by
the parameter "Monitoring of". In two-level heating or cooling mode, it is also possible
to set whether the floor temperature limit applies to the basic level only, the additional
level only or both the basic and additional levels.
The underfloor heating temperature to be monitored is fed into the controller via the
KNX communication object "Floor temperature - Measured value". This object can be
used to inform the controller of the current floor temperature using suitable temperat-
ure value telegrams from other bus devices (e.g. analogue input with temperature
sensor, etc.).
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
Function
Boost function - Re-
maining run time
Name
RTC x - Output
Type
DPT
Flag
2 bytes 7,005
C, R, -, T, -
Page 196 of 257
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